B15 (SBC) LED Candle Bulb 4.2W 470lm Dimmable - Warm White 2700K

This is a 4.2W LED candle bulb on a B15 small bayonet cap, and it is the cap that matters most when you are replacing something. B15 has two small pins on a narrow bayonet base, slimmer than the more common B22 bayonet on a standard household bulb. If the old bulb pushed in and twisted rather than screwed, and its base looked slim, B15 is right. It gives 470lm from 4.2W, which the pack puts at a 40W replacement, so it is a like for like swap for an older 40W incandescent candle. The opal finish diffuses the light so the diodes inside do not read as bright dots.

Candle bulbs earn their keep where the bulb is part of what you see: chandeliers, wall lights with shallow shades, small pendants and table lamps with clip-on shades. B15 in particular turns up on older chandeliers and imported fittings, and on many bedside and picture lights. At 2700K the light is warm white, the same yellow-leaning tone people remember from filament bulbs, which suits sitting rooms, bedrooms and hallways far better than a cooler white would. With 470lm it works as a single lamp in a small room, or as one of several in a multi-arm fitting where the total adds up quickly.

The bulb is dimmable, though LED dimming depends on the dimmer as much as the lamp: an old resistive dimmer built for 40W filament bulbs may have a minimum load this 4.2W lamp cannot meet, while a trailing edge LED dimmer will behave better. Energy rating is E. The pack prints a 15,000 hour lifespan. Each box holds one bulb, and our minimum order is 12, sold in multiples of 12. Alongside this we list the same B15 candle in a non-dimmable version, a dimmable 4000K cool white, a brighter 7.3W 806lm dimmable warm white, and B15 golf bulbs at the same 470lm.

How do I tell a B15 cap from a B22 cap?

Both push in and twist, but B15 is the slimmer of the two at around 15mm across the base, while B22 measures about 22mm. Measure the old bulb's metal base before ordering.

Will it work properly on a dimmer switch?

It is a dimmable lamp, so yes on a suitable dimmer. Older resistive dimmers made for filament bulbs often have a minimum load a single 4.2W LED cannot reach, which shows up as flicker or a dead bottom end; a trailing edge LED dimmer handles it far better.

Is 470lm going to be bright enough?

470lm is what an older 40W incandescent candle gave, which the pack confirms as the replacement figure. In a multi-arm chandelier the outputs add together, so four of these give a well lit sitting room.

What does 2700K look like in the room?

2700K is warm white, a soft yellow-leaning light close to the old filament bulbs. It flatters wood, brick and warm paint colours, and it is the tone most people want for evenings rather than a crisp 4000K white.

Does the manufacturer state an IP rating?

No IP rating is stated for this lamp, on either the specification or the retail pack, so we make no claim about water or dust protection. Where a fitting calls for a rated lamp, choose one with the rating printed on its pack.

How many bulbs do I receive?

Each box contains one bulb. The minimum order on this listing is 12 boxes, sold in multiples of 12, so you receive 12 individually boxed bulbs.